一种平面开槽超宽带天线的设计与研究  

Design and Analysis of a Ultra-wideband Planar Notched Antenna

作　　者：徐海洋[1] 张厚[1] 王剑[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800

出　　处：《探测与控制学报》2008年第4期40-43,共4页Journal of Detection & Control

摘　　要：提出了一种新型的小型超宽带(UWB)指数渐变开槽天线,此天线用180°微带线相移器馈电网络馈电,研究了其相移器馈电网络的转接特性和反射损耗。并在辐射部分的前后端分别开小槽缝,改善了带内特性,进一步展宽了天线的频带,使天线的带宽大于3∶1(S11<-10 dB)。方向图在整个带宽范围内具有较好的方向特性,并在X波段具有良好的对称端射特性,在中心频段增益大于10 dB。A new type of miniature ultra-wideband exponential tapered slot antenna was put forward, which is fed by a 180 degree microstrip phase shifter network. The switching characteristic and the reflecting loss of the phase shifter were also analyzed. Some subminiature slots are excavated at the front and back ends of the radiation part. As a result, the in-band characteristic is improved and the frequency band of the antenna is expanded to more than 3 ： 1（ S11〈-10 dB）. The radiation pattern has better direction characteristic in the entire band- width and favorable symmetrical end radiation characteristic in X band as well as more than 10 dB gain in the central frequency band.

关 键 词：超宽带 开槽天线 小槽缝 对称端射 相移馈电 

分 类 号：TN822.4[电子电信—信息与通信工程]